<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <input type="text" @keyup.enter="sayHi">
        <input type="button" value="Enter" @click="sayHi">
    </div>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    <script>
        var app = new Vue({
            el: "#app",
            methods:{
                //keyup.enter事件
                //keyup是松开
                sayHi: function(){
                    alert("Hello~")
                }
            }
        })
    </script>
</body>
</html>